Communications, Radar and Signal Processing, IEE Proceedings F

Issue 6 • October 1986

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Displaying Results 1 - 12 of 12
  • Editorial

    Publication Year: 1986
    IEEE is not the copyright holder of this material | PDF file iconPDF (101 KB)
    Freely Available from IEEE
  • Crosscorrelation between the envelopes of 900 MHz signals received at a mobile radio base station site

    Publication Year: 1986, Page(s):506 - 512
    Cited by:  Papers (89)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (757 KB)

    An experimental investigation is reported of the crosscorrelation of 900 MHz signals received by two spatially separated antennas at a base station. The investigation embraced vertical, horizontal and combined horizontal and vertical separation of the antennas, for transmission from test routes 1.3 km from the base station. It was found that a crosscorrelation ¿¿0.7 (i.e. when diversity improvemen... View full abstract»

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  • Assessment of Kalman-filter channel estimators for an HF radio link

    Publication Year: 1986, Page(s):513 - 521
    Cited by:  Papers (17)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1172 KB)

    The paper compares a Kalman-filter channel estimator with an alternative and much simpler estimator, for a synchronous serial data-transmission system operating at 9600 bit/s over a model of a voiceband HF radio link. A 16-level QAM signal is transmitted over the voiceband link, the latter having two independent Rayleigh fading sky waves, with a relative transmission delay of 2 ms and a frequency ... View full abstract»

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  • Hybrid constant factor incremental delta modulators

    Publication Year: 1986, Page(s):522 - 525
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (452 KB)

    The paper presents a new adaptive delta modulator, called the hybrid constant factor incremental delta modulator (HCFIDM), which uses instantaneous as well as syllabic adaptation of the step size. Three instantaneous algorithms have been used: two new instantaneous algorithms (CFIDM-3 and CFIDM-2) and the third, Song's voice ADM (SVADM). The quantisers have been simulated on a digital computer and... View full abstract»

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  • Recursive estimation with uncertain observations in a multisensor environment

    Publication Year: 1986, Page(s):527 - 533
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (786 KB)

    There is increasing interest in simultaneously employing multiple sensors in surveillance and search systems. The paper treats the recursive estimation problem with uncertain observations when multiple sensors are used. Discrete-time results are obtained when the observations contain the signal to be estimated with probability one. These results are then extended to the case when the observations ... View full abstract»

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  • Performance comparison of detection methods derived from maximum-likelihood sequence estimation

    Publication Year: 1986, Page(s):535 - 542
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1006 KB)

    The performance of various detection methods which are derived from full maximum-likelihood sequence estimation (MLSE) was investigated for channels introducing linear distortion and additive noise. The Viterbi algorithm may be applied to full MLSE, to maximum-likelihood soft-decision decoding of convolutional codes, or to the combined operations of detection in the presence of intersymbol interfe... View full abstract»

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  • Transmission of images using an adaptive ternary delta modulator

    Publication Year: 1986, Page(s):543 - 549
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1348 KB)

    Constant-area quantisation (CAQ), a predictive encoding scheme specifically designed for the transmission of images over narrowband channels, is discussed, and modifications to both the predictor and quantiser are described. These modifications result in improved image quality at a lower transmitted bit rate while still maintaining the relative simplicity of hardware implementation of the CAQ enco... View full abstract»

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  • Traffic performance characterisation of a personal radiocommunication system

    Publication Year: 1986, Page(s):550 - 561
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1560 KB)

    A recently proposed personal radiocommunication system is described. The system, which is intended to provide a low-cost mobile radiotelephone service, employs a novel radio link architecture that combines features of centralised and distributed control. Consumers would typically purchase two transceivers, one for a vehicle, the other for the home. The latter unit interfaces with the public switch... View full abstract»

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  • Error correction in a reversed communications scenario

    Publication Year: 1986, Page(s):562 - 568
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1060 KB)

    The identity of a certain part X is commonly established by receiving from it an n-bit signal desirably known only to X and the receiver. This demonstrates a case where the purpose of transmitting n bits is not for increasing the knowledge of the receiver by n units of information, but for proving to the receiver that the transmitter has that information. This demonstrates a case of a `reversed¿¿ ... View full abstract»

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  • New channel assignment strategy in cellular mobile radiocommunication systems

    Publication Year: 1986, Page(s):569 - 575
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (978 KB)

    Currently used channel assignment strategies in cellular mobile radiocommunication systems deal inefficiently with the higher-priority demands for a communication channel posed by a user who enters a new cell while his telephone conversation is in progress. A completely new strategy for allocating communication channels to various users is proposed in the paper. The proposed strategy creates natur... View full abstract»

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  • Performance of 64-QAM, 225-QPRS and 256-QAM in a cochannel interference environment

    Publication Year: 1986, Page(s):576 - 581
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1075 KB)

    The performance of 64-QAM (quadrature amplitude modulation), 225-QPRS (quadrature partial-response signalling) and 256-QAM in the presence of cochannel interference (CCI) and thermal noise is evaluated. It is found that the amplitude-modulated CCI causes more degradation than the single sinusoidal CCI. Measured data of a 256-QAM modem in a CCI environment show good agreement with the simulated res... View full abstract»

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  • Book review: Target Adaptive Matched Illumination Radar: Principles and Applications

    Publication Year: 1986, Page(s):581 - 582
    IEEE is not the copyright holder of this material | PDF file iconPDF (311 KB)
    Freely Available from IEEE

Aims & Scope

The latest version of this title is Radar, Sonar & Navigation, IET.

Full Aims & Scope